摘要
本文应用自由网平差、二维契比雪夫函数逼近和滤波方法,对京津唐地区的水准网1968年—1975年复测成果进行了数据处理和图象分析研究,获得了唐山7.8级地震前的地壳垂直运动的两个标志:“形变峰”与“形变潮”。本文初步讨论了这两个标志的形成机制及其表象特征,试图揭示其迁移性、方向性和变化速率与地震发生之间的关系。若这些现象具有普遍性的话,无疑对预报未来地震发生的地点将具有重要作用。
A series of the relevelling data for 1968—1975 in Beijing—Tianjin—Tangshan region are processed and analyzed in image by the adjusting of free network and the approaching and filtering of the Chebyshev two-dimensional.Two marks of crustal vertical movement before Tangshan earthquake(magnitude 7.8),the deformation peak and the deformation tide, are obtained.The formation mechanism and the repre-sentation character of two marks are discussed preliminary in order to expose the relationship of the transference, the direction and the change rate with the earthquake.Undoubtedly,it is important action for the predication of earthquake location if those are general.
出处
《地壳形变与地震》
CSCD
1990年第3期1-11,共11页
Crustal Deformation and Earthquake
